Programming with Java — Summer 2019

Answer the Following 1. Java is platform independent. (True / False) 2. Object o; The above statement creates an object or a reference? 3. Array is a primitive data type. (True / False) 4. Name a Collection that stores data as key value pairs. 5. Runnable is an interface. (True / False) 6. An interface can inherit from a class. (True / False) 7. Class initializer block is executed before initializer block. (True / False)

Explain why is JAVA popular with appropriate reasons.

What is Encapsulation with respect to object oriented programming? Explain how does it help in achieving Abstraction using proper example.

List all the primitive data types. Explain each of them in one line. Also explain the relationship of sub-type and super-type of primitive data types using diagram.

Explain how arrays can be declared. Also explain using diagram how are two dimensional arrays stored in memory.

How can interfaces be used to solve the ambiguity in case of multiple inheritance? Write proper code to explain.

1. Explain boxing conversion with respect to Wrapper classes. 2. What is use of static import. Explain using example.

What are the uses of Comparable and Comparator interfaces? Differentiate between the Comparable and Comparator interfaces.

1. Method overloading is which type of polymorphism. Explain compile time polymorphism. 2. Explain the equalsIgnoreCase, substring and compare methods of String class.

Draw the hierarchy diagram of top level exception classes. Differentiate between checked and unchecked exceptions.

Where is Collection framework used? Discuss the Set and List interfaces with example.

What is the usage of exceptions in Java. Discuss the try, catch, finally using proper code.

What are the benefits of using generic type while using collections in JAVA? Can we ignore providing generic type while instantiating objects?

Explain the purpose InputStream, Reader, OutputStream and Writer classes.

What is a thread? Explain the steps of creating a thread using Runnable interface. OR1

Explain the Object streams? Why is serialization necessary in case of using object streams?

1. Explain the different states of a thread. 2. What is a daemon thread. Give one example of a daemon thread.